01:119:115 Lecture Notes - Lecture 22: Carl Linnaeus, Phylogenetics, Descent Ii
24 Dec 2015
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November 13, 2014: systematics, study of the diversity of organisms and their evolutionary relationships, 2 parts, taxonomy describing, naming, and classifying organisms, phylogeny evolutionary history. Binomial system & nomenclature: species basic unit, naming species, carolus linnaeus, for each species gave a unique 2 part name, genus + specific epithet (name) Hierarchical classification: species basic level of classification, hierarchy which consists of several levels of classification. Taxon (taxa) grouping of organisms at any one of these levels: each taxonomic level is more inclusive (has more species) than the level below it. Order carnivera teeth modified for shearing meat (also dogs, bears, Class mammalia hair and produce milk (dogs, bears, raccons, raccoons) humans, rabbits) etc: taxonomists group organisms based on characteristics. Phylogenetic tree: branching diagram represents evolutionary history of group of organisms. Show patterns of descent not phenotype similarities: represents a hypothesis about evolutionary relationships.
